Multiply and simplify.
? 
A. 1
B. 
C. -1
D. 0
Answer: A
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Solve the problem.Find the moment of inertia about the x-axis of a thin plane of constant density 
bounded by the coordinate axes and the line 
.
A. 504
B. 588
C. 686
D. 
Solve the problem.The area A of a triangle is 10x2 + 7x - 12. If the height of the triangle is 2x + 3, find the length of its base.
A. 2(5x + 4)
B. 2(5x - 4)
C. 5x - 4
D. 
Graph the function.y = -2 + cot x
A. 
B. 
C. 
D. 
Solve the problem.
The graph models the average amount spent annually on entertainment per household in Country X from 1981 to 1987. (i) Find the slope of the line. (ii) Find a point-slope form for the line. (Answers may vary.)
A. Slope is 675; point-slope form is y = 675(x - 1982) + 1500. B. Slope is 825; point-slope form is y = 825(x - 1984) + 2850. C. Slope is 375; point-slope form is y = 375(x - 1982) + 1500. D. Slope is 525; point-slope form is y = 525(x - 1984) + 2850.